Question

Tommy is saving money to buy a new set of skis that cost $155.Currently Tommy has $85 saved and he is planning on saving $18 perweek. How many weeks will he need to save to buy the skis? (Write andsolve an inequality that represents this situation.)

Answer 1

Let x = number of weeks

Initial cost = $85

Cost per week = $18

Final cost = $155

An inequality that represents this situation is:

$85+18x=155$

Then solve for x:

$\begin{gathered} 85+18x-85=155-85 \\ 18x=70 \\ \frac{18x}{18}=\frac{70}{18} \\ x=3.88\approx4 \end{gathered}$

Answer: he needs to save 4 weeks to buy the skis